FiftyThree, the Georg Petschnigg brain child, are bringing their popular Paper app to the iPhone. Another reason to own an iPad or iPad mini has been eliminated and made available to the iPhone 6+. The preview image looks to contain a UI with a field notes type feeling.
Bottom line: those who like writing in field notebooks when they have a quick idea are going to get the full power and usefulness of Paper by FiftyThree in the not too distance future.